Large-torque hydraulic motor crankshaft

Abstract

The invention discloses a large-torque hydraulic motor crankshaft. By means of the large-torque hydraulic motor crankshaft, the starting torque and the transmission torque of a motor can be improved.According to the technical scheme, by means of the eccentric bent neck end of the motor crankshaft and an eccentric wheel shaft connected with a coaxial connecting rod, the degree of freedom of horizontal, vertical and front-back reciprocating motion of the crankshaft is limited, pressing rings for bearing hydraulic pressure and roller pins assembled in the pressing rings are assembled at the position, between the eccentric bent neck end and the eccentric wheel shaft end, of the crankshaft, the pressing rings are arranged at intervals through spacer rings and distributed between positioning spacer rings and baffle rings in a linear array manner, it is guaranteed that the roller pins make contact with the pressing rings all the time in the working process of the crankshaft, an axial positioning effect is achieved on the roller pins, and a static pressure balance structure is formed between the roller pins and a crankshaft motion pair; and hydraulic force applied to the pressing rings generates the torque enabling the crankshaft to rotate through the eccentric distance e of the crankshaft, and the roller pins convert a sliding friction motion pair between the inner surfaces of the pressing rings and the outer surface of the crankshaft into a rolling friction motion pair. Reliability of stable transmission efficiency and precision is ensured.

Description

technical field [0001] The invention relates to a hydraulic motor mainly used in injection molding machinery, ships, hoists, engineering machinery, construction machinery, coal mining machinery, mining machinery, metallurgical machinery, ship machinery, petrochemical industry, port machinery, etc. It specifically relates to the design of hydraulic motor crankshafts. Background technique [0002] A hydraulic motor is an actuator of a hydraulic system and a device that converts hydraulic pressure energy into mechanical energy. It converts the hydraulic pressure energy provided by the hydraulic pump into the mechanical energy (torque and speed) of its output shaft. Liquids are media that transmit force and motion. Hydraulic motors, also known as oil motors, require forward and reverse rotation, and their structure is symmetrical. The function of the hydraulic motor is to convert hydraulic energy into mechanical energy, the crankshaft is the output end of the hydraulic motor,...

AI Technical Summary

Problems solved by technology

The disadvantage is that the hydraulic motor must have sufficient back pressure at the oil return port to ensure normal operation, and the higher the speed, the greater the back pressure required. The increase in back pressure means that the pressure utilization rate of the oil source is low, and the system's big loss

However, excessively increasing the back pressure will significantly reduce the efficiency of the hydraulic motor

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